Initial Rates MethodChemistry
Method of Initial Rates & Reaction Order Calculator
Determine individual reaction orders (m, n), overall reaction order, and rate constant (k) empirically from multi-experiment initial concentration and rate data.
Calculated Result
Reaction Order (m)
0-
Calculator Inputs
M
Quick select:
m/s
Quick select:
M
Quick select:
m/s
Quick select:
Reaction Order (m)
0-
Empirical Rate Constant (k)
0 kinetic units
Rate Multiplier Ratio (Rate 2 / Rate 1)
2 -
Conc Ratio
2 -
Concentration Factor vs Rate Acceleration
Conc Ratio
2 -(50%)
Rate Ratio
2 -(50%)
Standard laboratory chemical kinetics tool for experimental rate law formulation.
Calculation Methodology
Rate Law: Rate = k * [A]^m * [B]^n. Comparing trials: m = ln(Rate2 / Rate1) / ln([A]2 / [A]1) and n = ln(Rate3 / Rate1) / ln([B]3 / [B]1). Overall Order = m + n. Rate constant k = Rate1 / ([A]1^m * [B]1^n).
Frequently Asked Questions
Measuring rates at t = 0 isolates the forward reaction before the accumulation of products triggers reverse reactions or catalytic interference.
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